Indicatorii Biodiversității
Flashcard
•
Science
•
12th Grade
•
Easy
MORA ELENA
Used 3+ times
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14 questions
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1.
FLASHCARD QUESTION
Front
Ce reprezintă abundența în ecologie?
Back
Numărul total de indivizi ai unei specii observați într-o anumită suprafață de probă.
2.
FLASHCARD QUESTION
Front
Care sunt cele două tipuri de abundență?
Back
Abundență absolută (Aₐ) și abundență relativă (Aᵣ).
3.
FLASHCARD QUESTION
Front
Cum se calculează abundența relativă (Aᵣ)?
Back
Raportul procentual dintre indivizii unei specii și numărul total de indivizi din comunitate.
4.
FLASHCARD QUESTION
Front
Ce arată frecvența unei specii?
Back
Proporția suprafețelor de probă în care apare o anumită specie.
5.
FLASHCARD QUESTION
Front
Care sunt clasele de frecvență și interpretarea lor?
Back
I: 1–20% - specie rară; II: 21–40% - specie ocazională; III: 41–60% - specie comună; IV: 61–80% - specie frecventă; V: 81–100% - specie constantă.
6.
FLASHCARD QUESTION
Front
Ce exprimă dominanța în ecologie?
Back
Gradul de acoperire al solului de către o specie.
7.
FLASHCARD QUESTION
Front
Care sunt clasele de dominanță conform Braun-Blanquet?
Back
r: indivizi rari, < 1%; 1: 5–25%; 2: 25–50%; 3: 50–75%; 4: 75–100%.
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